CN218396278U

CN218396278U - Die-cutting machine

Info

Publication number: CN218396278U
Application number: CN202222719519.8U
Authority: CN
Inventors: 邓志勇; 禹如初; 吴铁锋
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-01-31
Anticipated expiration: 2032-10-17

Abstract

The application relates to a die cutting machine, which comprises an unreeling mechanism, a cutting mechanism and a reeling mechanism; the unwinding mechanism, the cutting mechanism and the winding mechanism are sequentially arranged along the tape-feeding direction of the pole piece material tape, the unwinding mechanism is used for releasing the pole piece material tape, the cutting mechanism is used for cutting the pole piece material tape, and the winding mechanism is used for winding the pole piece material tape; wherein, cutting mechanism includes first cutting member, middle cutting member and the second cutting member that lays in proper order along the width direction in pole piece material area, and first cutting member is used for cutting the marginal blank area in first edge and forms utmost point ear, and middle cutting member is used for cutting the marginal blank area in middle and forms utmost point ear, and second cutting member is used for cutting the marginal blank area in second edge and forms utmost point ear. The die-cutting machine that provides in this application can alleviate the lower problem of utilization ratio of material area substrate to can reduce the cost of supplied materials.

Description

Die-cutting machine

Technical Field

The application relates to the technical field of battery production, in particular to a die-cutting machine.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

The battery includes the battery monomer, and the free pole piece of battery includes the pole piece substrate and coats in the active material layer on pole piece substrate surface, in the forming process of pole piece, generally need use cutting mechanism to cut the blank area that is not covered by the active material layer on the material area substrate to form utmost point ear.

However, traditional cross cutting machine generally adopts unilateral or bilateral cutting and forms the mode of utmost point ear, and the material area substrate that downcuts handles as the waste material, and the utilization ratio of material area substrate is lower, comes the material with high costs.

SUMMERY OF THE UTILITY MODEL

In view of above-mentioned problem, the application provides a cross cutting machine can alleviate the lower problem of the utilization ratio of material area substrate to can reduce the cost of supplied materials.

A die-cutting machine is used for die-cutting a pole piece material belt, wherein a first edge blank area, a middle blank area and a second edge blank area are sequentially arranged on the pole piece material belt along the width direction of the pole piece material belt, and the die-cutting machine comprises an unreeling mechanism, a cutting mechanism and a reeling mechanism;

the unwinding mechanism, the cutting mechanism and the winding mechanism are sequentially arranged along the tape-feeding direction of the pole piece material tape, the unwinding mechanism is used for releasing the pole piece material tape, the cutting mechanism is used for cutting the pole piece material tape, and the winding mechanism is used for winding the pole piece material tape;

wherein, cutting mechanism includes first cutting member, middle cutting member and the second cutting member that lays in proper order along the width direction in pole piece material area, and first cutting member is used for cutting first marginal blank area and forms utmost point ear, and middle cutting member is used for cutting middle blank area and forms utmost point ear, and second cutting member is used for cutting second marginal blank area and forms utmost point ear.

By using the die cutter, the material belt base material with the blank middle area can be cut into the polar lug belt of the two polar piece belts. Compared with the traditional die cutting mode, under the condition that the number of the formed pole piece strips is the same, the mode can make full use of the material strip base material in the middle blank area and cut the pole lugs on the two pole lug strips, so that the utilization rate of the material strip base material is improved and the incoming material cost is reduced compared with the single-side or double-side cutting mode in the prior art.

In addition, adopt the cross cutting machine in this application, still can make simultaneously and form many polar plates area, compare in prior art, under the prerequisite that satisfies the same productivity, the cross cutting machine quantity that this application used is less, and the comprehensive utilization of equipment is higher.

In one embodiment, the pole piece material belt is provided with at least two middle blank areas arranged along the width direction of the pole piece material belt;

the cutting mechanism comprises at least two middle cutting pieces, and the at least two middle cutting pieces correspond to all the middle blank areas one to one.

Through setting up two at least middle cutting pieces, can form two utmost point ear areas with the material area base material cutting of every middle blank area, can effectively promote the productivity of pole piece and the utilization ratio of material area base material for the incoming material cost further reduces.

In one embodiment, the intermediate cutting member comprises two sub-cutting members arranged along the width direction of the pole piece material belt, and the two sub-cutting members are respectively used for cutting two tabs arranged along the width direction of the pole piece material belt in the intermediate blank area.

The setting of two sub-cutting pieces for two utmost point ear areas can be formed simultaneously in the middle blank area that corresponds to middle cutting piece, thereby help promoting cutting efficiency.

In one embodiment, the device further comprises a cutting mechanism, wherein the cutting mechanism is arranged between the cutting mechanism and the winding mechanism along the tape moving direction of the pole piece material tape;

the slitting mechanism is used for slitting the pole piece material belt cut by the slitting mechanism.

Through setting up cutting mechanism, can separate a plurality of polar plate areas and form many polar plate strips to help follow-up cutting polar plate strip.

In one embodiment, the pole piece material belt cutting device further comprises a dust removing mechanism, the dust removing mechanism is arranged between the cutting mechanism and the splitting mechanism and/or between the splitting mechanism and the winding mechanism along the belt moving direction of the pole piece material belt, and the dust removing mechanism is used for removing dust on the cut pole piece material belt.

Through setting up dust removal mechanism, dust removal mechanism can remove dust to pole piece area and/or pole piece strip, and has better dust removal effect, and prevent to be infected with the dust on the pole piece of follow-up formation and lead to the performance of battery impaired.

In one embodiment, the device further comprises an unreeling tape splicing mechanism;

unwinding mechanism includes unreels the roller and unreels the standby roll, unreels the splicing mechanism and is used for bonding the ending section of pole piece material area of rolling on unreeling the roller with the originated section of pole piece material area of rolling on unreeling the standby roll.

Unreel tape splicing mechanism through setting up, can realize unreeling the roller and unreel the automation of reserve roller and connect the material to help promoting cross cutting efficiency.

In one embodiment, the device further comprises a rolling belt connecting mechanism;

the winding mechanism comprises a winding roller and a winding standby roller, and the winding belt receiving mechanism is used for cutting off the pole piece material belt which is not wound after the winding of the winding roller is completed and winding the pole piece material belt on the winding standby roller.

Through setting up rolling tape splicing mechanism, can realize that the automatic rolling of wind-up roll and rolling reserve roller connects the material to help promoting cross cutting efficiency.

In one embodiment, the device further comprises a deviation correcting mechanism, wherein the deviation correcting mechanism is arranged between the unwinding mechanism and the winding mechanism along the tape travelling direction of the pole piece material tape; the deviation rectifying mechanism is used for rectifying the deviation of the pole piece material belt.

Through setting up the mechanism of rectifying, can in time rectify the pole piece material area, and/or the pole piece area that the cutting of pole piece material area formed, and/or the pole piece strip that the cutting of pole piece area formed rectifies, like this, at the in-process that the pole piece material area was carried, cutting mechanism can cut the pole piece material area accurately, cuts the mechanism and also can cut the pole piece area accurately.

In one embodiment, the device further comprises a tensioning mechanism, wherein the tensioning mechanism is arranged between the unwinding mechanism and the winding mechanism along the tape-feeding direction of the pole piece material tape; the tensioning mechanism is used for tensioning the pole piece material belt.

Through setting up straining device, straining device can tension pole piece material area, and/or the pole piece area that the pole piece material area cutting formed, and/or one in the pole piece strip that the pole piece area cutting formed to make things convenient for unreeling, transport and the rolling of pole piece material area.

In one embodiment, the device further comprises a detection mechanism and a marking mechanism electrically connected with the detection mechanism, wherein the detection mechanism and the marking mechanism are sequentially arranged along the tape moving direction of the pole piece material tape and are both positioned between the cutting mechanism and the winding mechanism;

the detection mechanism is used for detecting the material strap information of the cut pole piece material strap, and the marking mechanism is used for marking the pole piece material strap when the material strap information does not meet the requirements.

Through setting up detection mechanism and marking mechanism for cross cutting machine can automatic identification certified products and defective work, thereby can make things convenient for follow-up to certified products and defective work sort.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a die cutting machine according to an embodiment of the present application.

The reference numbers in the detailed description are as follows:

1. die-cutting machine; 10. an unwinding mechanism; 11. unwinding rollers; 12. unwinding a standby roller; 13. an unwinding turntable; 20. a cutting mechanism; 30. a winding mechanism; 31. a wind-up roll; 32. winding a standby roller; 33. rolling a turntable; 40. a slitting mechanism; 50. an air knife dust removal assembly; 60. a brush dust removal assembly; 70. an unreeling and splicing mechanism; 80. a rolling and belt connecting mechanism; 90. a deviation rectifying mechanism; 100. a tensioning mechanism; 110. a marking mechanism; 120. a detection mechanism; 130. a conveying roller; 140. a belt splicing mechanism.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles and electric automobiles, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The battery includes the battery monomer, and the free pole piece of battery includes the pole piece substrate and coats in the active material layer on pole piece substrate surface, and in the forming process of pole piece, the blank area that is not covered by the active material layer on the material area substrate need be cut to cutting mechanism usually to form utmost point ear.

Traditional pole piece material area has set gradually first marginal blank area along its width direction, and coating area and second marginal blank area, first marginal blank area and second marginal blank area are only formed by the material area substrate, and the coating area is formed by the material area substrate and the active material layer combination that coats on the material area substrate.

The traditional die cutting machine generally adopts a single-edge or double-edge cutting mode to cut the polar sheet material strip. The single-edge cutting means a mode of sequentially cutting the first edge blank area and the second edge blank area to form the tab. For example, the first margin blank area may be cut first to form the tab, and then the second margin blank area may be cut to form the tab, or the second margin blank area may be cut first to form the tab, and then the first margin blank area may be cut to form the tab. The double-edge cutting refers to a mode of simultaneously cutting the first edge blank area and the second edge blank area to form the tabs. After cutting, all the tabs in the first edge blank area, the coating area and all the tabs in the second edge blank area are combined to form a tab belt.

The applicant notices that the cut material belt base material is treated as waste material by adopting a single-side or double-side cutting mode, the utilization rate of the material belt base material is lower, and the material supply cost is high.

In order to improve the utilization rate of a material belt base material, through deep research, the applicant designs a die-cutting machine, wherein the die-cutting machine is used for die-cutting a pole piece material belt, the pole piece material belt is sequentially provided with a first edge blank area, a middle blank area and a second edge blank area along the width direction of the pole piece material belt, and the die-cutting machine comprises an unreeling mechanism, a cutting mechanism and a reeling mechanism; unwinding mechanism, cutting mechanism and winding mechanism lay in proper order along the tape transport direction in pole piece material area, and unwinding mechanism is used for releasing the pole piece material area, and cutting mechanism is used for cutting the pole piece material area, and winding mechanism is used for rolling the pole piece material area. Wherein, cutting mechanism includes first cutting member, middle cutting member and the second cutting member that lays in proper order along the width direction in pole piece material area, and first cutting member is used for cutting first marginal blank area and forms utmost point ear, and middle cutting member is used for cutting middle blank area and forms utmost point ear, and second cutting member is used for cutting second marginal blank area and forms utmost point ear.

The pole piece material belt is located in an area between the first edge blank area and the middle blank area, and the area between the middle blank area and the second edge blank area forms a coating area.

In such cross cutting machine, first cutting member is used for cutting first marginal blank area and forms utmost point ear, second cutting member is used for cutting second marginal blank area and forms utmost point ear, middle cutting member is used for cutting middle blank area and forms two utmost point ears of laying along the width direction in pole piece material area, and along with unwinding mechanism continuously releases pole piece material area, first cutting member forms a utmost point ear area at the blank cutting in first marginal blank area, second cutting member forms a utmost point ear area at the blank cutting in second marginal blank area, middle cutting member forms two utmost point ear areas at the blank cutting in middle. The tab belt is a general name of all tabs sequentially arranged along the tape moving direction of the pole piece material belt. One of the tab belts in the middle blank area is adjacent to the first edge blank area, and the other tab belt is adjacent to the second edge blank area.

The pole ear belt of the first marginal blank area, the pole ear belt adjacent to the first marginal blank area in the middle blank area, and the coating area between the first marginal blank area and the middle blank area are combined to form a pole piece belt, the pole ear belt of the second marginal blank area, the pole ear belt adjacent to the second marginal blank area in the middle blank area, and the coating area between the second marginal blank area and the middle blank area are also combined to form a pole piece belt.

Therefore, the die cutter can be used for cutting the material belt base material with the blank middle area to form two polar ear belts. Compared with the traditional die cutting mode, under the condition that the number of the formed pole piece belts is the same, the mode can fully utilize the material belt base material in the middle blank area and cut the pole piece belts to form the two pole ear belts, so that the utilization rate of the material belt base material is improved and the incoming material cost is reduced compared with the single-side or double-side cutting mode in the prior art.

Referring to fig. 1, the die cutting machine 1 used in the present application may be used not only for cutting a pole piece material tape, but also for cutting a film material tape, a cloth material tape, and the like. The following embodiments are all described by taking the die cutter 1 for cutting the pole piece material strip as an example.

In some embodiments of the present application, the die cutting machine 1 is configured to die cut a pole piece material strap, the pole piece material strap is sequentially provided with a first blank edge area, a middle blank area, and a second blank edge area along a width direction of the pole piece material strap, and the die cutting machine 1 includes an unwinding mechanism 10, a cutting mechanism 20, and a winding mechanism 30; the unwinding mechanism 10, the cutting mechanism 20 and the winding mechanism 30 are sequentially arranged along the tape feeding direction X of the pole piece material tape, the unwinding mechanism 10 is used for releasing the pole piece material tape, the cutting mechanism 20 is used for cutting the pole piece material tape, and the winding mechanism 30 is used for winding the pole piece material tape; wherein, cutting mechanism 20 includes first cutting member, middle cutting member and the second cutting member that lays in proper order along the width direction in pole piece material area, and first cutting member is used for cutting first marginal blank area and forms utmost point ear, and middle cutting member is used for cutting middle blank area and forms utmost point ear, and second cutting member is used for cutting second marginal blank area and forms utmost point ear.

The pole piece material belt comprises a material belt substrate and active substance layers, wherein the active substance layers are multiple and coated on the material belt substrate at intervals along the width direction of the pole piece material belt. The material belt base material can form a current collector of the pole piece through subsequent multiple cutting. The material area substrate has first edge zone and second edge zone that the width direction of pole piece material area set up, first edge zone is because of not coating active substance layer and forming the first edge blank area in pole piece material area, the second edge zone is because of not coating active substance layer and forming the second edge blank area in pole piece material area, the material area substrate is located between first edge zone and the second edge zone and the middle blank area that the region of not coating active substance layer formed the pole piece material area, the material area substrate is located the region between first edge zone and the middle blank area and coats the active substance layer on this region with coating, and the material area substrate is located the region between second edge zone and the middle blank area and coats the active substance layer on this region with coating, all make up the coating district that forms the pole piece material area.

Taking the pole piece material belt with only one middle blank area as an example, the pole piece material belt is sequentially provided with a first edge blank area, a coating area, a middle blank area, a coating area and a second edge blank area along the width direction of the pole piece material belt. The first edge blank area, the coating area, the middle blank area and the second edge blank area all extend along the tape moving direction X of the pole piece material tape.

Of course, the number of the intermediate blank areas formed on the pole piece material strip is not limited to one, and may be a plurality of. If the number of the middle blank areas is multiple, the area of the pole piece material belt between two adjacent middle blank areas is also a coating area. For example, if two intermediate blank regions are taken as an example, the first edge blank region, the coating region, the intermediate blank region, the coating region, and the second edge blank region are sequentially disposed along the width direction of the pole piece material tape.

In some embodiments, the unwinding mechanism 10 may only include an unwinding roller 11, a pole piece material strip is wound on the unwinding roller 11, and the unwinding roller 11 may realize unwinding by rotating around its own central axis. In other embodiments, the unwinding mechanism 10 may further include an unwinding roller 11, an unwinding backup roller 12, and an unwinding turntable 13, where the unwinding roller 11 and the unwinding backup roller 12 are disposed on the unwinding turntable 13, and the pole piece material strip is wound around both the unwinding roller 11 and the unwinding backup roller 12. After the pole piece material belt on the unwinding roller 11 is unwound, the unwinding turntable 13 rotates around its rotation axis, so that the unwinding backup roller 12 can rotate to the position of the original unwinding roller 11 and unwind.

In some embodiments, the winding mechanism 30 may only include the winding roller 31, and the winding roller 31 may realize winding of the pole piece material strap by rotating around its own central axis. In other embodiments, the winding mechanism 30 may further include a winding roller 31, a standby winding roller 32 and a winding turntable 33, the winding roller 31 and the standby winding roller 32 are disposed on the winding turntable 33, and both the winding roller 31 and the standby winding roller 32 may be used for winding the pole piece material tape. When the wind-up of the wind-up roller 31 is completed, the wind-up turntable 33 rotates around its rotation axis, so that the wind-up backup roller 32 can rotate to the original position of the wind-up roller 31 and wind up.

Wherein, first cutting member, second cutting member and middle cutting member can be cutter, laser cutting head etc. specifically can select according to the demand. The quantity of middle cutting spare equals and the one-to-one correspondence with the quantity of middle blank, and every middle cutting spare is used for cutting corresponding middle blank and forms utmost point ear.

In the cross cutting machine 1 that this application provided, first cutting member is used for cutting the marginal blank area of first edge and forms utmost point ear, second cutting member is used for cutting the marginal blank area of second edge and forms utmost point ear, middle cutting member is used for cutting the marginal blank area in the middle and forms two utmost point ears of laying along the width direction in pole piece material area, and along with unwinding mechanism 10 continuously releases the pole piece material area, first cutting member forms a utmost point ear area in the marginal blank area cutting of first edge, the second cutting member forms an utmost point ear area in the marginal blank area cutting of second edge, middle cutting member forms two utmost point ear areas in the marginal cutting in the middle. The tab belt refers to a general name of all tabs sequentially arranged along the tape moving direction X of the pole piece material belt. One of the tab belts in the middle blank area is adjacent to the first edge blank area, and the other tab belt is adjacent to the second edge blank area.

The middle cutting part can comprise two sub-cutting parts which simultaneously cut and respectively form a corresponding polar ear band, or the middle cutting part can only comprise one sub-cutting part which forms two polar ear bands in the middle blank area according to a preset moving conveying path.

Taking the pole piece material belt only having one middle blank area as an example, after the cutting is completed, the pole ear belt of the first edge blank area, the pole ear belt adjacent to the first edge blank area in the middle blank area, and the coating area between the first edge blank area and the middle blank area are combined to form a pole piece belt; the pole ear belt of the second marginal blank area, the pole ear belt adjacent to the second marginal blank area in the middle blank area, and the coating area between the second marginal blank area and the middle blank area are also combined to form a pole piece belt. That is, in this embodiment, the strip of pole pieces may be cut to form two strips running across the width of the strip of pole pieces.

Taking the pole piece material belt with two middle blank areas as an example, after cutting, the pole ear belt of the first middle blank area, the pole ear belt adjacent to the first middle blank area in the first middle blank area, and the coating area between the first middle blank area and the first middle blank area are combined to form the pole piece belt; the lug belt adjacent to the second edge blank area in the first middle blank area, the lug belt adjacent to the first edge blank area in the second middle blank area and the coating area positioned between the first middle blank area and the second middle blank area are combined to form a pole piece belt; the pole ear belt of the second marginal blank area, the pole ear belt of the second marginal blank area adjacent to the second marginal blank area in the second middle blank area, and the coating area between the second middle blank area and the second marginal blank area are combined to form a pole piece belt. That is, in this embodiment, the strip of pole pieces may be cut to form three strips of pole pieces arranged along the width direction of the strip of pole pieces.

In the conventional technology, two electrode strip belts are formed by bilateral cutting, two times of circular operation are required to be performed by using the die cutting machine 1 to form the two electrode strip belts, and only one electrode strip belt can be formed by cutting one electrode strip belt in each operation. And the material belt base materials of the first marginal blank area and the second marginal blank area can be cut into a polar ear belt in each cutting operation, and the cut material belt base materials are directly treated as waste materials.

And in this application, can form two pole piece belts with the cutting of same pole piece material area, and the material area substrate that is located middle blank area still can cut and form two utmost point ear areas. Therefore, by using the die cutter 1, the material belt base material with the blank middle area can be cut to form the polar ear belt of the two polar piece belts. Compared with the traditional die cutting mode, under the condition that the number of the formed pole piece strips is the same, the mode can make full use of the material strip base material in the middle blank area and cut the pole lugs on the two pole lug strips, so that the utilization rate of the material strip base material is improved and the incoming material cost is reduced compared with the single-side or double-side cutting mode in the prior art.

In addition, adopt cross cutting machine 1 in this application, still can make simultaneously and form many polar plates area, compare in prior art, under the prerequisite that satisfies the same productivity, cross cutting machine 1 that this application used is less in quantity, and the comprehensive utilization ratio of equipment is higher.

In some embodiments of the present application, the pole piece material tape has at least two intermediate blank areas arranged along the width direction thereof; the cutting mechanism 20 includes at least two intermediate cutting members that correspond one-to-one with all the intermediate blank areas.

Each intermediate cutting piece is used for cutting the corresponding intermediate blank area to form two tab belts distributed along the width direction of the pole piece material belt.

After the cutting is completed, each pole piece belt can be conveyed along the same conveying path, or different pole piece belts can be conveyed along different conveying paths, that is, the conveying paths of every two pole piece belts are different, or a part of pole piece belts can be conveyed along the same conveying path, and different pole piece belts are conveyed along different conveying paths in the other part of pole piece belts. It should be noted that all the pole piece tapes conveyed along the same conveying path are arranged side by side along the width direction of the pole piece tapes.

The following embodiments are all described by taking the example that the pole piece belts include two conveying paths, wherein one conveying path simultaneously conveys two pole piece belts, and the other conveying path conveys one pole piece belt.

In the following embodiments, two intermediate blank areas and two intermediate cutting members are used as examples for illustration. In this embodiment, the completed strip of pole pieces is cut by the cutting mechanism 20 to form three strips of pole pieces.

In some embodiments of the present application, the intermediate cutting member includes two sub-cutting members arranged along the width direction of the pole piece material belt, and the two sub-cutting members are respectively used for cutting two tabs arranged along the width direction of the pole piece material belt in the intermediate blank area.

Specifically, each sub-cutting member cuts one tab in the corresponding intermediate blank area in a unit time. As the unwinding mechanism 10 continuously releases the pole piece material strip, each sub-cutting member can cut a pole ear strip in the middle blank area.

In some embodiments of the present application, the die cutting machine 1 further includes a slitting mechanism 40, and the slitting mechanism 40 is disposed between the cutting mechanism 20 and the winding mechanism 30 along the feeding direction X of the pole piece material strip; the slitting mechanism 40 is used for slitting the pole piece material belt cut by the cutting mechanism 20.

It will be appreciated that the completed strip of pole pieces cut by the cutting mechanism 20 comprises a strip of pole pieces.

The number of the slitting mechanisms 40 is determined by the number of the feeding paths of the pole piece tapes.

For example, in one embodiment, the number of slitting mechanisms 40 is equal to and corresponds to the number of transport paths for the pole piece belts. For example, taking three pole piece tapes cut by the cutting mechanism 20, and the pole piece tapes have two conveying paths as an example, two slitting mechanisms 40 are provided, and correspond to the two conveying paths one by one, and each slitting mechanism 40 is used for slitting the pole piece tapes on the corresponding conveying path.

For another example, in one embodiment, the number of slitting mechanisms 40 is equal to and corresponds to the number of pole piece strips. Each transport path is provided with an equal number of slitting mechanisms 40 as the number of strips of pole pieces it transports. For example, taking a conveying path for conveying two pole piece belts simultaneously as an example, two slitting mechanisms 40 located at different positions may be disposed on the conveying path, and the two slitting mechanisms 40 are respectively used for slitting the pole piece belts corresponding to the two slitting mechanisms.

For another example, in some embodiments, only one slitting mechanism 40 may be provided, with the pole piece belts on all of the transport paths passing through a same slitting mechanism 40, and each pole piece belt being slit during its passage through the slitting mechanism 40.

The following examples are all described with reference to the slitting mechanism 40 as one example.

In some embodiments, slitting mechanism 40 may include a slitting frame and a plurality of cutters disposed on the slitting frame. All cutters are arranged at intervals along the width direction of the pole piece material belt, and each cutter is used for cutting the pole piece material belt corresponding to the cutter.

In some embodiments, the slitting mechanism 40 includes a first slitting roller, a second slitting roller and a plurality of cutting knives, the first slitting roller and the second slitting roller are disposed on two opposite sides of the pole piece material strip along the thickness direction of the pole piece material strip, and both the first slitting roller and the second slitting roller extend along the width direction of the pole piece material strip. All the cutters can be positioned on the first slitting roller or the second slitting roller, or part of the cutters can be positioned on the first slitting roller, the rest of the cutters are positioned on the second slitting roller, and each cutter is used for cutting the corresponding pole piece belt in the process that the pole piece belt passes through the space between the first slitting roller and the second slitting roller.

For example, if the die cutting machine 1 performs cutting to form three pole piece belts each time, three cutters may be provided and correspond to the three pole piece belts one by one, each cutter is located at a central position in a coating area of the corresponding pole piece belt, and in the process of belt transport, each cutter cuts the pole piece belt along the belt transport direction X to form two pole piece strips, and then the three pole piece belts may form six pole piece strips under the action of the three cutters. The pole piece strip comprises a plurality of pole pieces which are sequentially distributed along the tape moving direction X. Under the action of the unwinding mechanism 10 and the winding mechanism 30, each pole piece strip can be wound by the winding mechanism 30. Then, a cutting machine can be used for cutting each pole piece strip according to a preset length to form a plurality of pole pieces.

The following embodiments are all described by taking as an example that the slitting mechanism 40 includes a first slitting roller, a second slitting roller and a plurality of slitting blades. Wherein, the setting position of cutting mechanism 40 can be selected as required, only need guarantee that it is located between cutting mechanism 20 and the winding mechanism 30 can.

Through setting up cutting mechanism 40, can separate a plurality of pole piece areas and form many pole piece strips to help follow-up cutting the pole piece strip.

In some embodiments of the present application, the die cutting machine 1 further includes a dust removing mechanism, the dust removing mechanism is disposed between the cutting mechanism 20 and the splitting mechanism 40 and/or between the splitting mechanism 40 and the winding mechanism 30 along the feeding direction X of the pole piece material strip, and the dust removing mechanism is configured to remove dust on the pole piece material strip after cutting.

The pole piece material strap that the cutting was accomplished includes pole piece area and pole piece strip.

Dust is easily formed in the cutting and slitting processes, so that a dust removing mechanism is required to remove dust from the cut pole piece belt and/or the slit pole piece strip.

For example, the dust removing mechanism is located between the cutting mechanism 20 and the splitting mechanism 40, and is used for removing dust on the pole piece belts formed by cutting the pole piece belts. For another example, the dust removing mechanism can also be located between the slitting mechanism 40 and the winding mechanism 30, and is used to remove dust on the pole piece strips formed by slitting the pole piece tapes.

In one embodiment, the dust removing mechanism may include an air knife dust removing assembly 50, the air knife dust removing assembly 50 being located between the cutting mechanism 20 and the slitting mechanism 40 and used to remove dust from the pole piece tape. Air knife dust removal subassembly 50 includes first dust removal roller, second dust removal roller and the piece of blowing, and first dust removal roller and second dust removal roller lay in the both sides that the pole piece material area is relative along the thickness direction in pole piece material area, and just first dust removal roller and second dust removal roller all extend along the width direction in pole piece material area. The blowing part can be positioned on the first dust removal roller or the second dust removal roller, and the blowing part is used for blowing off dust on each pole piece belt in the process that all the pole piece belts pass through the space between the first dust removal roller and the second dust removal roller simultaneously.

In the same dust removing mechanism, the number of the blowing pieces can be set according to requirements, for example, the number of the blowing pieces is multiple, and all the blowing pieces are positioned on the first dust removing roller or the second dust removing roller; or, part of the blowing pieces can be positioned on the first dust removal roller, the rest part of the blowing pieces can be positioned on the second dust removal roller, all the blowing pieces positioned on the first dust removal roller are in one-to-one correspondence with all the pole piece belts, all the blowing pieces positioned on the first dust removal roller are also in one-to-one correspondence with all the pole piece belts, and each blowing piece is used for blowing off dust on one side, facing the blowing piece, of the corresponding pole piece belt.

In some embodiments of the present application, the dust removing mechanism further comprises a brush dust removing assembly 60, and the brush dust removing assembly 60 is located between the slitting mechanism 40 and the winding mechanism 30 and is used for removing dust on the pole piece strips. The brush dust removal assembly 60 includes a first brush and a second brush, the first brush and the second brush are disposed on two opposite sides of the pole piece material strip along the thickness direction of the pole piece material strip, and the first brush and the second brush both extend along the width direction of the pole piece material strip. In the process that all pole piece strips pass through the space between the first dust removal roller and the second dust removal roller, the first hairbrush and the second hairbrush are respectively used for removing dust on each pole piece strip.

In some embodiments, the air knife dusting assembly 50 and the brush dusting assembly 60 may also be interchangeable. That is, the air knife dust removing assembly 50 is located between the slitting mechanism 40 and the winding mechanism 30 and is used for removing dust on the pole piece strips, and the brush dust removing assembly 60 is located between the slitting mechanism 20 and the slitting mechanism 40 and is used for removing dust on the pole piece strips.

Of course, in some embodiments, the dust removing mechanism may also include only the air knife dust removing assembly 50 or the brush dust removing assembly 60. When the dust removing mechanism only comprises the air knife dust removing assembly 50, the air knife dust removing assembly 50 is used for removing dust on the pole piece belts and the pole piece strips. When the dust removing mechanism only comprises the brush dust removing assembly 60, the brush dust removing assembly 60 is used for removing dust on the pole piece belts and the pole piece strips.

The number of the air knife dust removing assembly 50 and the number of the brush dust removing assembly 60 can be determined according to the number of the conveying paths of the pole piece belts, and the determination method is the same as that of the slitting mechanism 40, and therefore, the detailed description thereof is omitted.

The following embodiments are described by taking the example that the number of the air knife dust removing assemblies 50 and the number of the brush dust removing assemblies 60 are one, the pole piece strips on all the conveying paths pass through one same air knife dust removing assembly 50, and the pole piece strips on all the conveying paths pass through one same brush dust removing assembly 60.

In some embodiments of the present application, the die cutting machine 1 further includes an unwinding splicing mechanism 70; the unwinding mechanism 10 includes an unwinding roller 11 and an unwinding standby roller 12, and the unwinding splicing mechanism 70 is used for bonding a final section of the pole piece material belt wound on the unwinding roller 11 with a starting section of the pole piece material belt wound on the unwinding standby roller 12.

For example, the unwinding splicing mechanism 70 may include an unwinding robot and an adhesive tape winding roller, and an adhesive tape is wound on the adhesive tape winding roller. After the unwinding of the unwinding roller 11 is completed, the unwinding manipulator can operate the adhesive tape on the adhesive tape winding roller to bond the tail section of the pole piece material strip on the unwinding roller 11 with the start section of the pole piece material strip on the unwinding backup roller 12, so that the unwinding backup roller 12 can unwind and feed.

Certainly, the unwinding splicing mechanism 70 is not limited to the above one, and may further include a compression roller, and after the unwinding manipulator attaches the tape and the tail end section of the pole piece material belt on the unwinding roller 11 to the start section of the pole piece material belt on the unwinding backup roller 12, the compression roller may flatten the tape, so that the tape can firmly bond the tail end section of the pole piece material belt on the unwinding roller 11 and the start section of the pole piece material belt on the unwinding backup roller 12.

Through setting up unreel splicing mechanism 70, can realize unreeling roller 11 and unreel the automation of reserve roller 12 and connect the material to help promoting cross cutting efficiency.

In some embodiments of the present application, die cutting machine 1 further includes a take-up and take-up mechanism 80; the winding mechanism 30 comprises a winding roller 31 and a winding standby roller 32, and the winding and receiving mechanism 80 is used for cutting off the uncoiled pole piece material belt and winding the uncoiled pole piece material belt on the winding standby roller 32 after the winding of the winding roller 31 is completed.

For example, the winding and splicing mechanism 80 may include a winding manipulator and a cutting knife, wherein when the winding of the winding roller 31 is completed and there is a pole piece strip that is not wound, the cutting knife cuts off the pole piece strip, and then the winding manipulator can operate the winding of the pole piece strip on the winding backup roller 32. Further, the winding standby roller 32 rotates to continue winding the pole piece strip.

Wherein, the quantity of rolling tape splicing mechanism 80 can set up according to the quantity of the transfer route of pole piece area, for example, rolling tape splicing mechanism 80 sets up to one, and the pole piece strip that forms at all pole piece area cutting is rolled up simultaneously on same wind-up roll 31 or rolling backup roll 32. Or, a plurality of winding mechanisms 30 may be provided, all the winding mechanisms 30 correspond to all the conveying paths one by one, and each winding mechanism 30 is used for winding the pole piece strips on the corresponding conveying path. It should be mentioned that, when a plurality of pole pieces arranged side by side exist on the same conveying path at the same time, and all the pole pieces on the conveying path are wound on the same winding roller 31 or the standby winding roller 31, all the pole pieces on the conveying path are also arranged side by side on the winding roller 31 or the standby winding roller 31 on which the pole pieces are wound.

Through setting up rolling tape splicing mechanism 80, can realize that the automatic rolling of wind-up roll 31 and rolling standby roll 32 connects the material to help promoting cross cutting efficiency.

In some embodiments of the present application, the die-cutting machine 1 further includes a deviation correcting mechanism 90, and the deviation correcting mechanism 90 is disposed between the unwinding mechanism 10 and the winding mechanism 30 along a tape traveling direction X of the pole piece material tape; the deviation rectifying mechanism 90 is used for rectifying deviation of the polar sheet material belt.

The deviation correcting mechanism 90 may be disposed between the unwinding mechanism 10 and the cutting mechanism 20, and/or disposed between the cutting mechanism 20 and the splitting mechanism 40, and/or disposed between the splitting mechanism 40 and the winding mechanism 30, and may be specifically disposed according to requirements. In the following embodiments, the deviation correcting mechanisms 90 are disposed between the unwinding mechanism 10 and the cutting mechanism 20, between the cutting mechanism 20 and the splitting mechanism 40, and between the splitting mechanism 40 and the winding mechanism 30.

The deviation rectifying mechanism 90 located between the unwinding mechanism 10 and the cutting mechanism 20 is used for rectifying the pole piece material belt, the deviation rectifying mechanism 90 located between the cutting mechanism 20 and the slitting mechanism 40 is used for rectifying the pole piece belt, and the deviation rectifying mechanism 90 located between the slitting mechanism 40 and the winding mechanism 30 is used for rectifying the pole piece strip.

Wherein, the mechanism 90 of rectifying can include rectifying roller, the collection piece of rectifying and controller, rectifying roller extends along the width direction in pole piece material area, the collection piece of rectifying is used for gathering the transmission information in pole piece material area, pole piece area and the pole piece strip and feeds back to the controller, the controller compares transmission information and standard information, if transmission information and standard information do not accord with, the explanation takes place the skew, the controller drive rectifying roller is along its axial slip, until through rectifying roller's pole piece material area, pole piece area and pole piece strip one in the relative roller of rectifying does not take place the skew. If the transmission information is consistent with the standard information, the deviation does not occur, and the deviation rectification roller does not move along the axial direction.

The deviation correcting collecting piece can be positioned above the deviation correcting roller of the same deviation correcting mechanism 90 and collects the transmission information of one of the pole piece material belt, the pole piece belt and the pole piece strip passing through the deviation correcting roller; alternatively, the acquisition of the transmission information may be performed before and/or after one of the pole piece material belt, the pole piece belt and the pole piece strip passes through the rectification roller.

In an embodiment, for example, the deviation correcting and collecting element may be a camera, the camera is used for collecting an actual image of one of the pole piece material strap, the pole piece material strap and the pole piece strip and feeding the actual image back to the controller, and the controller compares the actual image with the standard image.

For another example, the deviation rectification collecting element may be a distance measuring instrument, the distance measuring instrument is configured to collect an actual distance between a first edge blank area of one of the pole piece material strip, the pole piece strip and the pole piece strip passing through the offset roller and an end surface of the offset roller adjacent to the first edge blank area, and feed the actual distance back to the controller, and the controller compares the actual distance with the standard distance.

During actual operation, the uncut pole piece material belt and the pole piece belt formed by cutting the pole piece material belt can be deviated in the conveying process, so that the cutting precision and the cutting precision of the subsequently conveyed pole piece material belt are poor, and the product rejection rate is high.

And through setting up mechanism 90 of rectifying, can in time rectify the pole piece material area, and/or the pole piece area that the cutting of pole piece material area formed, and/or the pole piece strip that the cutting of pole piece area formed rectifies, like this, at the in-process that the pole piece material area was carried, cutting mechanism 20 can cut the pole piece material area accurately, cuts mechanism 40 also can cut the pole piece area accurately.

In some embodiments of the present application, the die cutting machine 1 further includes a tensioning mechanism 100, and the tensioning mechanism 100 is disposed between the unwinding mechanism 10 and the winding mechanism 30 along a tape feeding direction X of the pole piece material tape; tensioning mechanism 100 is used to tension the strip of pole pieces.

The number of the tensioning mechanisms 100 is determined in the same manner as the number of the deviation correcting mechanisms 90, and therefore, the description thereof is omitted. In the following embodiments, the tensioning mechanisms 100 are disposed between the unwinding mechanism 10 and the cutting mechanism 20, between the cutting mechanism 20 and the splitting mechanism 40, and between the splitting mechanism 40 and the winding mechanism 30.

Wherein the tensioning mechanism 100 may be a tensioning roller, a tensioning shaft, or the like.

By arranging the tensioning mechanism 100, the tensioning mechanism 100 can tension the pole piece material belt and/or the pole piece belt formed by cutting the pole piece material belt and/or one of the pole piece strips formed by cutting the pole piece belt, so that the pole piece material belt can be conveniently unreeled, conveyed and reeled.

In some embodiments of the present application, the die cutting machine 1 further includes a detecting mechanism 120 and a marking mechanism 110 electrically connected to the detecting mechanism, wherein the detecting mechanism 120 and the marking mechanism 110 are sequentially arranged along the tape feeding direction X of the pole piece tape and are both located between the cutting mechanism 20 and the winding mechanism 30; the detection mechanism 120 is used for detecting the material belt information of the cut pole piece material belt, and the marking mechanism 110 is used for marking the pole piece material belt when the material belt information does not meet the requirement.

The detecting mechanism 120 may include a detecting member and a control body, the detecting member and the marking mechanism 110 are electrically connected to the control body, and the tape information includes appearance information of the tape, width information of the tape, and the like. The material area information that the detection piece will gather feeds back to the control main part, and the control main part is compared material area information and preset information. If the material belt information does not accord with the preset information, the material belt is unqualified. The control main body controls the marking mechanism 110 to feed the tape to mark in the process that the tape passes through the marking mechanism 110; if the material belt information conforms to the preset information, the material belt is qualified, and the controller controls the marking mechanism 110 to not mark the material belt in the process that the material belt passes through the marking mechanism 110.

Wherein, the material area includes at least one in pole piece material area, pole piece area and the pole piece strip.

In an embodiment, the detecting member may be a camera, the camera is used for collecting the image of the material belt and feeding back the image to the control main body, and the control main body compares the image of the material belt with a preset image.

For another example, the detection piece can be a width gauge, the distance gauge is used for collecting the width of the material belt and feeding back the width to the control main body, and the control main body compares the width of the material belt with a preset width.

The marking mechanism 110 may be a marking mechanism capable of being used for marking colors or a marking mechanism for marking patterns, and the marking mechanism 110 is any one of the existing marking mechanisms that can be used for marking, and therefore, the details are not described herein.

The determination of the number of the detecting mechanisms 120 is the same as the determination of the number of the deviation rectifying mechanisms 90, and therefore, the description thereof is omitted here. In the following embodiments, the detection mechanisms 120 are disposed between the cutting mechanism 20 and the winding mechanism 40, and between the cutting mechanism 40 and the winding mechanism 30, and the marking mechanism 110 is disposed between the cutting mechanism 40 and the winding mechanism 30. The detecting mechanism 120 located between the cutting mechanism 20 and the splitting mechanism 40 can be used for detecting the appearance and width of the pole piece belt, and the detecting mechanism 120 located between the splitting mechanism 40 and the winding mechanism 30 can be used for detecting the width of the pole piece strip. It should be mentioned that when detecting that there is a problem in the width of the pole piece belt, the control main body further needs to control the cutting mechanism 20 to adjust, so as to ensure that the width of the pole piece belt formed by the cutting mechanism 20 in the following cutting process meets the requirement of battery production. When detecting that there is a problem in the width of pole piece strip, the control main part still need control cutting mechanism 40 to adjust to guarantee that the width of follow-up pole piece strip that forms through cutting mechanism 40 cutting satisfies the demand of battery production.

Through setting up detection mechanism 120 and marking mechanism 110 for cross cutting machine 1 can automatic identification certified products and defective work, thereby can conveniently follow-up sorting to certified products and defective work.

In an embodiment, in some embodiments of the present application, the die cutting machine 1 further includes a tape splicing mechanism 140, and the tape splicing mechanism 140 is disposed between the unwinding mechanism 10 and the winding mechanism 30 along a tape feeding direction X of the pole piece tape; the splicing mechanism 140 is used for connecting the pole piece material belt with cracks.

The determination of the number of the splicing mechanisms 140 is the same as the determination of the number of the deviation rectifying mechanisms 90, and therefore, the description thereof is omitted here. In the following embodiments, the unwinding mechanism 10 and the cutting mechanism 20, the cutting mechanism 20 and the slitting mechanism 40, and the slitting mechanism 40 and the winding mechanism 30 are all exemplified by providing the reception platforms. The splicing platform located between the unwinding mechanism 10 and the cutting mechanism 20 is used for connecting a pole piece material belt with cracks, the splicing platform located between the cutting mechanism 20 and the slitting mechanism 40 is used for connecting a pole piece belt formed by cutting the pole piece material belt with cracks, and the splicing platform located between the slitting mechanism 40 and the winding mechanism 30 is used for connecting a pole piece strip formed by cutting the pole piece belt with cracks.

In some embodiments, the splicing mechanism 140 can include a splicing platform and a robot. When the pole piece material belt passing through the belt splicing platform cracks, the manipulator operates the cutter to cut off the part with the cracks, and then the broken pole piece material belt is bonded again.

Through setting up tape splicing mechanism 140, can realize the automatic tape splicing of cross cutting machine 1 to the normal transport in pole piece material area has been guaranteed.

In some embodiments, the die cutting machine 1 further comprises a conveying mechanism including a plurality of conveying rollers 130 arranged in sequence along the feeding direction X, each conveying roller 130 extending along the width direction of the pole piece web. Each feed roller 130 can automatically feed the strip of pole pieces as it rotates about its central axis.

Next, the operation of the die cutting machine 1 in one embodiment will be described in detail.

The unwinding mechanism 10 unwinds the pole piece material tape, and the pole piece material tape can be fed along the tape feeding direction X under the action of the tensioning mechanism 100 and the conveying mechanism. In the process that the pole piece material belt passes through the cutting mechanism 20, the cutting mechanism 20 cuts the pole piece material belt into three pole piece belts. The three pole piece strips are then divided into two transport paths, the first transport path being used for transporting two pole piece strips and the second transport path being used for transporting one pole piece strip. In the process that the three pole piece belts pass through the same splitting mechanism 40, the splitting mechanism 40 divides the three pole piece belts into six pole piece strips, and then four of the pole piece strips are received by the winding mechanism 30 located on the first conveying path, and the other two pole piece strips are received by the winding mechanism 30 located on the second conveying path.

Referring to fig. 1, according to some embodiments of the present disclosure, a die cutting machine 1 is used for die cutting a pole piece material strap, the pole piece material strap is sequentially provided with a first blank area on a first edge, a middle blank area and a second blank area on a second edge along a width direction of the pole piece material strap, the die cutting machine 1 includes an unwinding mechanism 10, a cutting mechanism 20 and a winding mechanism 30; the unwinding mechanism 10, the cutting mechanism 20 and the winding mechanism 30 are sequentially arranged along the tape feeding direction X of the pole piece material tape, the unwinding mechanism 10 is used for releasing the pole piece material tape, the cutting mechanism 20 is used for cutting the pole piece material tape, and the winding mechanism 30 is used for winding the pole piece material tape; wherein, cutting mechanism 20 includes first cutting member, middle cutting member and the second cutting member that lays in proper order along the width direction in pole piece material area, and first cutting member is used for cutting first marginal blank area and forms utmost point ear, and middle cutting member is used for cutting middle blank area and forms utmost point ear, and second cutting member is used for cutting second marginal blank area and forms utmost point ear. The pole piece material belt is provided with at least two middle blank areas distributed along the width direction of the pole piece material belt; the cutting mechanism 20 includes at least two intermediate cutting members that correspond one-to-one with all the intermediate blank areas. Each middle cutting piece comprises two sub-cutting pieces arranged in the width direction of the pole piece material belt, and the two sub-cutting pieces are respectively used for cutting in the middle blank area to form two tabs arranged in the width direction of the pole piece material belt.

In this application, can form two pole piece belts with the cutting of same pole piece material area, and the material area substrate that is located middle blank area still can cut and form two utmost point ear areas. Therefore, by using the die cutter 1, the material belt base material with the blank middle area can be cut to form the polar ear belt of the two polar piece belts. Compared with the traditional die cutting mode, under the condition that the number of the formed pole piece strips is the same, the mode can make full use of the material strip base material in the middle blank area and cut the pole lugs on the two pole lug strips, so that the utilization rate of the material strip base material is improved and the incoming material cost is reduced compared with the single-side or double-side cutting mode in the prior art.

And through setting up two at least middle cutting pieces, can form two utmost point ear areas with the material area base material cutting of every middle blank area, can effectively promote the productivity of pole piece and the utilization ratio of material area base material for the incoming material cost further reduces.

As for the setting of two sub-cutting pieces for two utmost point ear areas can be formed simultaneously in the middle blank area that corresponds to middle cutting piece, thereby help promoting cutting efficiency.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims

1. The die-cutting machine is characterized by being used for die-cutting a pole piece material belt, wherein a first edge blank area, a middle blank area and a second edge blank area are sequentially arranged on the pole piece material belt along the width direction of the pole piece material belt, and the die-cutting machine comprises an unreeling mechanism (10), a cutting mechanism (20) and a reeling mechanism (30);

the unwinding mechanism (10), the cutting mechanism (20) and the winding mechanism (30) are sequentially arranged along a tape travelling direction (X) of the pole piece material tape, the unwinding mechanism (10) is used for releasing the pole piece material tape, the cutting mechanism (20) is used for cutting the pole piece material tape, and the winding mechanism (30) is used for winding the pole piece material tape;

wherein, cutting mechanism (20) include and follow first cutting member, middle cutting member and the second cutting member that the width direction in pole piece material area laid in proper order, first cutting member is used for the cutting first marginal blank area forms utmost point ear, middle cutting member is used for the cutting middle blank area forms utmost point ear, the second cutting member is used for the cutting second marginal blank area forms utmost point ear.

2. The die cutting machine as recited in claim 1, wherein said strip of pole sheet material has at least two said intermediate blank spaces running across its width;

the cutting mechanism (20) comprises at least two middle cutting pieces, and the at least two middle cutting pieces correspond to all the middle blank areas one to one.

3. The die cutting machine of claim 1, wherein the intermediate cutting member comprises two sub-cutting members arranged along a width direction of the pole piece material strip, and the two sub-cutting members are respectively used for cutting in the intermediate blank area to form two tabs arranged along the width direction of the pole piece material strip.

4. The die cutting machine according to claim 1, characterized in that the die cutting machine further comprises a splitting mechanism (40), wherein the splitting mechanism (40) is arranged between the cutting mechanism (20) and the winding mechanism (30) along a feeding direction (X) of the pole piece material strip;

the slitting mechanism (40) is used for slitting the pole piece material belt which is cut by the cutting mechanism (20).

5. The die cutting machine according to claim 4, characterized by further comprising a dust removing mechanism, wherein the dust removing mechanism is arranged between the cutting mechanism (20) and the splitting mechanism (40) and/or between the splitting mechanism (40) and the winding mechanism (30) along the tape moving direction (X) of the pole piece material tape, and the dust removing mechanism is used for removing dust on the pole piece material tape after cutting.

6. The die cutting machine of claim 1, further comprising an unwind splicing mechanism (70);

unwinding mechanism (10) is including unreeling roller (11) and unreel backup roll (12), unreel splicing mechanism (70) be used for with the rolling in unreel roller (11) on the ending section in pole piece material area with the rolling in unreel on backup roll (12) the originated section in pole piece material area bonds.

7. The die cutting machine recited in claim 1, further comprising a take-up mechanism (80);

the winding mechanism (30) comprises a winding roller (31) and a standby winding roller (32), and the winding belt connecting mechanism (80) is used for cutting off the pole piece material belt which is not wound after the winding of the winding roller (31) is completed and winding the pole piece material belt on the standby winding roller (32).

8. The die cutting machine according to claim 1, further comprising a deviation correcting mechanism (90), wherein the deviation correcting mechanism (90) is arranged between the unwinding mechanism (10) and the winding mechanism (30) along a feeding direction (X) of the pole piece material strip; the deviation rectifying mechanism (90) is used for rectifying the deviation of the pole piece material belt.

9. The die cutting machine according to claim 1, further comprising a tensioning mechanism (100), wherein the tensioning mechanism (100) is arranged between the unwinding mechanism (10) and the winding mechanism (30) along a feeding direction (X) of the pole piece material strip; the tensioning mechanism (100) is used for tensioning the pole piece material belt.

10. The die cutting machine according to claim 1, further comprising a detection mechanism (120) and a marking mechanism (110) electrically connected with the detection mechanism (120), wherein the detection mechanism (120) and the marking mechanism (110) are sequentially arranged along a tape traveling direction (X) of the pole piece material tape and are both located between the cutting mechanism (20) and the winding mechanism (30);

the detection mechanism (120) is used for detecting the material belt information of the pole piece material belt after cutting, and the marking mechanism (110) is used for marking the pole piece material belt when the material belt information does not meet requirements.